Having trouble with file name with spaces

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http://forums.fedoraforum.org – If I do cd /run/media/len/My\ Book/Windows\ backup I get put in the right directory. However if i do BACK="/run/media/len/My\ Book/Windows\ backup" echo $BACK gives me the exact same sequence but cd $BACK gives me bash: cd: /run/media/len/My\: No such file or directory I've tried various different ways of writing it, but I can't get it to work. The spaces in the names were created long ago, probably under windows, and I don't see right now how to rename them. How do I get cd $BACK to work. (I need it in a shell script.) (HowTos)